Male J-POP Idol Series
- orange
- Otome continue
- otona MUSE
- [Oshi no ko]
- Okaeri Mone
- Osomatsu-san
- Ossan's Love
- Onegai My Melody
- Opanchu Usagi
- Ojamajo
- Otenki One-san
- Ori Sta
- Orient
- Olympic
- Orthros no Inu
- Orange Page
- Online Game
- Omo ni Naiteimasu
- Where Have My Skirts Gone?
- Ore no Hanashi wa Nagai
- Oh-oku / Ooku
- Oh-oku ( Danjo Gyakuten)
- Ohoka Echizen
- Okusama wa Toriatsukaichui
- Omoi, Omoware, Furi, Furare
- Omoide no Marnie (When Marnie Was There)
- Okitegami Kyoko Series
- Oishinbo
- Odoru Daisosasen Series
- Osozaki no Himawari
- Ongaku to Hito
- Ongaku-shi ga Kakanai Jpop Hihyo